One of the possible choices is levonorgestrel which can be a success as long as it is taken within 72 hours after unprotected sexual contact, especially if taken before ovulation. Nevertheless, if the event happened four days before ovulation, as you said, the successfulness may be decreased. The rapid reaction to the situation by means of wiping and washing may also reduce the risk but they are not completely effective. The signs which indicate the start of pregnancy are: delayed menstrual cycle, nausea and breast tenderness. For peace of mind, the better you have the pregnancy test if your period is late or go to the doctor for personalized advice. 

Feeling impotent or not lasting long in bed can really be annoying, but it needs to be handled early enough. Signs may be finding it hard to keep an erection and ejaculating too soon. Causes are; stress, unhealthy living or other unknown illnesses. Some tips for getting better include regular physical exercise, healthy eating habits and stress reduction methods such as meditation among others. Its also advisable that you seek medical help from professionals who will provide you with individualized treatment depending on your condition.

Using a condom that has been used already has a small risk of getting HIV or other infections. The first signs of HIV are fever, tiredness, and body aches. To remain safe, you should always use a new condom and get tested for HIV regularly. 

Such problems may result from different things such as stress, anxiety, or certain medical conditions. Take good care of yourself by getting enough sleep, eating healthy foods, and engaging in physical exercises regularly. Besides, try to open up with your spouse about this matter and at the same time practice some relaxation methods together. 

This issue is severe because it can lead to complications in the body through the semen being absorbed. It can be a symptom of a condition called semen retention, which may be experienced as weakness, fatigue, and sexual disorders. The treatment for this condition is proper exercise, a balanced diet, and sleep well.

Masturbating freque­ntly happens. Sometimes, it be­comes a tricky habit. When fee­ling addicted, distract yourself with activities. Sports, hobbie­s, and friends help. Open up to some­one. It's fine to get he­lp if struggling.